Button-blank-cutting machine.



G. W. SCHREURS. BUTTON BLANK CUTTING MACHINE.

APPLICATION FILED MAR.15, 1911.

Patented Nov. 21, 1911.

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G. w. SCHREURS. BUTTON BLANK CUTTING MACHINE. APPLIUATION FILEDw MA K.15, 1911. v 1 009 346 v Patented Nov. 21, 1911.

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UNITED STATES. PA TENT OFFICE.

GARRETT W. SCI-IREURS, MUSCATINE, IOWA.

BUTTON-BLANK-GU'ITING MACHINE.

To all whom it may concern:

Be it known that I, GARRETT IV. SCHREURS, of Muscatine, in the county ofHuscatine and State of Iowa, have invented certain new and usefulImprovements in Button- Blank-Cutting Machines; and I hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, which form part ofthis specification.

This invention is an improvement in button blank cutting machines,especially such as are employed in cutting blanks from shells, bone, andthe like. Its objects are to provide a machine wherein the plug orpusher is moved toward the saw, or vice versa, by frictionallycontrolled devices in such manner that the pressure on the shell isgradually but steadily applied in a manner far superior tohand-controlled work, and with resultant increase of efficiency andsuperiority of product of the machine.

The invention will be hereinafter set forth more in detail, withreference to the accompanying drawings which illustrate the, at present,preferred form of machine embodying the invention, and the features andcombinations of parts for which protection is desired are set forth inthe claims following the specifications.

In said drawings-Figure 1 is a side elevation of a complete machine.Fig. 2 is an enlarged plan view of the tail stock of such machine inwhich the invention is embodied. Fig. 3 is a longitudinal section online 33 Fig. 2, showing the plug retracted. Fig. 4

is a slmilar view showing the position of the parts when the plug isprojected.

In the drawings, 1 designates the headstock of the complete machine,which carries a shaft l having a tubular saw 1 attached to its inner endand provided with a stepped pulley 1 intermediate its bearings which canbe belted to any suitable driver, as usual. The head-stock is mounted ona bench or table of ordinary construction. Opposite the head-stock isthe tail-stock 2 in which Specification of Letters Patent.

Application filed March 15, 1911.

Patented Nov. 21, 1911.

Serial No. 614,726.

tail-stock, although longitudinally movable.

therein. The pusher 4L is journaled in opposite bearings 2 in the frameand on the pusher between the bearings is a collar 4: and between thiscollar and the front bearmg 2 is interposed a coil spring 4 whichoperates to normally hold the pusher rearward in retracted position. Thecollar 4 is connected by links 4 to a block or plate 5 which is adaptedto frictionally engage with the shaft 6 which is journaled in bearings 2on the tail-stock 2 and at right angles to the pusher. Preferably thelinks 4? are connected by bolts r to a rib 5 on the back of plate 5 andalso connected to the upper end of said plate, and the links are of suchlength that the pusher cannot be retracted until the plate 5 israised tothe position shown in Figs. 1 and 3, because shaft 6 would come withinthe path of the plate 5; and when the plate 5 is lowered it wedgesagainst the shaft 6 and forces links 45 to move the pusher 4 forward andforce the button material into contact with the saw.

The shaft 6 may be driven by a pulley 6" and a belt-6 from any suitabledriver or in any other suitable manner and rotates anticlockwise so thatit would tend to draw the plate 5 downward and thus would tend to forcethe pusher inward toward the saw. The plate may be provided with africtional surface 5 of metal hardened or in some cases artificial fiberor other material may be employed. This frictional surface can be detachably attached to the plate 5 by means of bolts 5; and the links 4:may be connected adjacent the plate 5 by a bolt or pin 4* which isconnected by a link 7 to a rod 7 which may be bent in U-shape and hasits end or end plates 7* loosely hung upon shaft 6. And this shaft 7 maybe attached to a hand lever 7 by which it can be raised or lowered bythe operator; Figs. 1 and 3 show the parts with the pusher at rest andthe plate 5 raised. WVhen the shaft 6 is rotating the operator can by aslight downward pressure on the lever 7 start the plate downward andinto forcible contact with the shaft 6; and the shaft (5 frictionallyengaging the surface of plate 5 will continue to force the latter todescend and thereby through links 4 force the pusher toward the saw andgradually force the shell against the saw and cut the blank. When theblank is cut the operator by lifting the handle 7 can throw plate 5upward against the action of the shaft 6;

and when the shell is adjusted can repeat the operation by againdepressing the hand lever and starting the plate 5 downward to bring itinto forcible engagement with the shaft 6.

By this invention many objections to the ordinary blank cutting machinesare overcome, such as, first-splitting and damaging of the blanks due tounequal or over pressure by the operator on the pusher; second, thedulling of the saw teeth by the same cause; third, the blanks cannot becut rapidly enough to make it profitable to the cutter; all of theseobjections are overcome by this invention.

I preferably drive shaft 6 from the line shaft (not shown) that drivesthe saw so that the power used is insignificant; I obtain force forcutting by the frictional action of shaft 6 against the surface of theplate 5 which is connected to the pusher at such angle that as the plateis drawn down the links impart the desired forward movement to thepusher. The hand lever 7 is used principally to raise the angle plate 5and permit spring 4 to retract the pusher. Only a slight pressure on thehandle is required to give the operator complete control of the pusherin cutting a blank. The pressure required on the lever '7 is so slightthat the. workman can easily operate this machine standing or sitting. Ipreferably employ in the pusher the plug shown in my Patent No. 882,426of March 17, 1908, and the head stock may be constructed as in saidpatent. By employing such devices I am able to cut any size blanks asplugs of any desired diameter can be used. I have found it impossible tosuccessively and uniformly cut blanks by screw or lever machines and theapplication of hand power as the workmen become tired and the pressurewhich they apply to the shells will vary; but by frictionally operatingthe pusher, as in the present invention, the work can be done withgreater uniformity and more rapidly than has heretofore been possible.Attaching the frictional plate 5 to the links in the manner shown in thedrawings is advantageous as the greatest pressure is produced whilecutting the first part of the blanks which is less apt to rupture theshell.

lVhile I have shown the plate 5 as straight or flat surfaced it may begiven any form which might be found desirable; and the contactingsurfaces of the shaft and plate may be of any suitable kind, or facedwith any suitable material which will facilitate the operation of theparts.

IVhile I prefer to operate the plate 5 by frictional contact asdescribed I do not wish to be absolutely restricted thereto.

By the application of power frictionally applied to the pusher theoperator simply has to control the time of action of the machine, anddoes not vary the advancing movement of the pusher during the cuttingoperation.

My machine will cut blanks far more rapidly than hand cutters and doesnot split and break the blanks as the hand machines do; and the sawswill hold their edge much longer than in hand operated machines.

hat I claim is:

1. In a button blank cut-ting machine, the combination of a saw, apusher, a rotatable shaft at right angles to the pusher, and meansconnected with said pusher frictionally engaging said shaft for bringingthe saw and pusher together, substantially as described.

2. In a button blank cutting machine, the combination of a saw, apusher, a rotatable shaft, a plate adapted to be frictionally operatedby said shaft, and means connected with said plate and pusher forbringing the saw and pusher together; with manually operable meanscontrolling the frictionally operated means, substantially as described.

3. The combination of a reciprocatory carrier, a rotatable shaft atright angles thereto, a member adapted to frictionally engage the shaftand be moved thereby in one direction to project the carrier, meansconnecting said member with the carrier, and means for retracting saidmember and the carrier independently of the shaft.

4. In a button blank cutting machine, the combination of a saw, apusher, and means for reciprocating the pusher comprising a rotatableshaft, an inclined plate adapted to be operated in one direction by saidshaft, connections between said plate and the pusher whereby when theplate is moved in one direction by the shaft the pusher is projected;and means for retracting the pusher when the plate is moved in theopposite direction.

5. In combination, areciprocating carrier, means for retracting thecarrier, a rotatable shaft at right angles to the carrier, a plateadapted to be operated by said shaft in one direction, links connectingsaid plate with the carrier, whereby the latter is pushed forward as theplate is moved by the shaft; and means for freeing the plate from theshaft.

6. The combination of a pusher carrier, means for retracting thecarrier, a rotatable shaft, a frictional member adapted to engage saidshaft, links connecting said member with the pusher carrier whereby thepusher is projected as the plate is operated by the shaft; and means forraising the plate.

7. In a button blank cutting machine, the combination of a reciprocatorypusher, a rotatable shaft at right angles thereto, a plate adapted to befrictionally operated by the shaft in one direction, means connectingsaid plate with the pusher, and means for moving said plate in theopposite direction, the plate projecting the pusher when it is operatedby the shaft.

8. In a button blank cutting machine, the combination of a reciprocatingpusher, means for retracting the pusher, a rotatable shaft at rightangles to the pusher, a plate adapted to be frictionally operated bysaid shaft in one direction, links connecting said plate with the pushercarrier, whereby the latter is pushed forward as the plat-e is moved bythe shaft, and means for disengaging the plate from the shaft.

9. The combination of a pusher carrier, a spring for retracting thecarrier, a rotatable shaft, a plate adapted to frictionally engage saidshaft, links connecting said plate with the pusher, said plate being setat an angle to the links, whereby the pusher is projected as the plateis operated by the shaft; and manually operable means for raising theplate.

10. The combination of a stock, a sleeve slidably mounted therein, apusher connected with said sleeve, a spring for retracting the sleeve, arotatable shaft at right angles to the sleeve, a friction plate adaptedto engage the shaft, links attached to said plate and pivotallyconnected to the sleeve, and manually operable means for raising thelate. p 11. The combination of a stock, a sleeve slidably mountedtherein, a pusher connected with said sleeve, a spring for retractingthe sleeve, a shaft at right angles to the sleeve, a plate adapted tofrictionally engage the shaft, links attached to said plate andpivotally connected to the sleeve; a rod pivoted beside the shaft, alever connected with said rod, and a link connecting said rod with theplate, whereby the plate may be raised out of contact with the shaft,substantially as described.

In testimony that I claim the foregoing as my own, I affix my signaturein presence of two witnesses.

GARRETT V. SCHRE URS.

Witnesses:

E. F. RIOI-IMAN, B. S. ALNUTT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G.

